Torque band brake



Feb. 10; 1942. c VAN HOOK Re. 22,024

TORQUE BAND BRAKE 6 Sheets-Sheet 3 Original Filed June 26, 1959 INVENTOR CHARLES F VAN HOOK fi MKW ATTORNEY Feb. 10, 1942. i c. F. VAN HOOK Re. 22,024

TORQUE BAND BRAKE Original Filed June 26, 1959 6 Sheets-Sheet 2 l I 5 /z. 36

J4 fl 4f 46 l. 4/ I 5 l6 I8 K i 1 7\ L i r' 22 V24 26- avvwwmfi AVAfiZ Q fl I "1 2 i 1 4 K i 1: i; 44 4 28 2 I 19 25 2/ '1 '1 :0V 25 f "L- l I INVENTOR CHARLES F. VAN HOOK BY Feb. 10, 1942. c. F. VAN HOOK TORQUE BAND BRAKE Original Filed June 26, 1939 6 Sheets-Sheet 5 INVENTOR: CHARLES F; VAN Hoon A RNEY Feb. 10, 1942. c VAN HOOK Re. 22,024

TORQUE BAND BRAKE o riginalFiled June 26, 1959 s Sheets-Sheet 4 INVENTOR. CHARLES F. VAN HOOK ATTORNEY.

Feb; 10, 1942.

c. F. VANHQOK TORQUE BAND BRAKE Origin al Filed 'June 26, 1939 6 Sheets-Sheet 5 Jiji INVENTOR CHA LES F. VAN HOOK FdLlO,

D=PAD OUTSIDE 'DIAMETER IN INCHES 1942. c; F. VAN HOOK TORQUF BAND BRAKE 6 Sheets-Sheet Original Filed June 26, 1939 INCREASE IN TAPE IN RUNNING OUT FROM Fuu; DIAMETER 0"1'0 EYE DIAMETER '01 WITH ANDARD BRAKE ol=EYE DIAMETER m mcuss INVEN OR: CHARLES E VAN HOOK BY 4.24? RNEY Reissued Feb. 10, 1942 UNITED STATES PATENT OFFICE rial No. 281,132, June 26, 1939. Application for reissue December 23, 1941, Serial No. 424,173 9 Claims. (01. 57-18) This invention relates to means for applying pressure or braking action to the material which is wound upon wire-or cable, this material generally being furnished in the form of a pad.

The invention also relates to lever-governed adjustable torque band brakes which are used to apply pressure or braking action to such material as it is wound out.

In taping operations which occur in the manufacture of electricwire and cable and in some constructions of hose, machines, termed taping heads in the trade, have been employed. These units feed the tape from pads, each pad having a center hole which holes are for mounting the pads on their carrying spindles or centers.

In the general case, in order to provide tension in the tape as it passes from the pad to be wrapped around a cable, or wire or hose, a brake is provided on each pad and in the general case,

this has been either an enveloping band or disc.

brake which for any setting, produced constant torque in the pad, and consequently caused tension to rise as the pad ran down. Thus, if the pad outside diameter were three times the pad center spindle diameter, for any one setting of brake throughout the pad, the tension on the tape at the finish became three times that at its beginning. To overcome this great and usually impracticable rise in tension, adjustment of the brake setting usually was made as the pad ran off, to endeavor to approximate constant tension. This, of course, necessitated stopping the head for every adjustment made to the brake.

I have provided a mechanism which will allow a single setting of the brake which will allow the pad to run down without necessitating the operator's changing this setting to reduce the tape tension. This setting is adjustable so as to allow the required variation or range of tape tensions which the employment of these heads require.

The compound float control lever which is part of my invention is so operative that when the tape breaks, the holding torque of the brake immediately rises considerably, thus preventing any loosening of the outer tape convolutions of the pad. Then the actual lever on which the control roll for the tape is mounted, is a compound-lever -this so that this roll will have a long float or drift are. This is for the purpose of avoiding tape breaks at quick stops and also to even out slight variations in tension due to brake float action as already explained.

While I regard it as impossible to devise a mechanical mechanism which will give a constant or uniform tension, yet the mechanism of the present invention will give a fully satisfactory arrangement through a lever device. This arrangement of lever-governed band brake has reference to any feeding run from a progressively decreasing diameter and but one setting of the brake for any tension value desired of the material.

In the drawings accompanying this specification, two practicable embodiments of the invention have been illustrated in which drawings- Figure 1 is an end view of a mechanism for applying one band of material to a moving device.

Figure 2 is a section of Figure 1 taken at about the line 2-2 of Figure 1. It will be noted that this line deviates somewhat from a straight line, but this is for the purpose of showing the mechanism asit exists.

Figure 3 is a view showing the pad of material, the brake drum on this and the braking mechanism separated somewhat from the rest of the machine, this view is at about the line 3-3 of Figure 2.

Figure 4 is a head somewhat like that shown in Figure 1, but it is oneof multiple heads which operate to supply respective windings to the moving part.

Figure 5 is a view taken at about the line 5-5 of Figure 4-the line of this view is also not quite straight, and

Figure 6 is a chart and formula which have reference to the operation of the device.

This description at the present time will deal with Figures 1, 2 and 3 and also with the chart of Figure 6. While 1 am. not dealing with the method for advancing the wire Ill, yet it will be assumed that this is pulled through the machine, or may be manufactured if it is a cable or some such device. In Figures 1 and 3 it is assumed to be coming toward the observer and in Figure 2 it is supposed to be running from the left hand side to the right hand side and has wrapped upon it a coating I I which, in the present instance, is a narrow band l2 which is supplied from apadof material I3 which is shown wrapped upon a drum l4. While this invention relates primarily to the mechanism for applying tension to the strip of material l2 as it is led 01f the drum and applied to the material being treated, yet, for the purpose of this description, it will be best to describe the action of the material and lead up to the means for applying the tension which will appear in its proper place in the description of the entire mechanism.

by means of a pin 46 to the plate 3|.

-*is engaged by a'spring plunger 41 which, and its spring' 41', is carried by a barrels481andwhich The drum I4, and its associated parts, carrying the pad of material, is caused to rotate about the parts which are adapted to carry the wire II].

The pad of material I3 in this illustration comprises a drum I4 which is held by means of suitable clips I5 which are adjusted by means of thumb nuts I6 to screws I1 projecting from the main plate I8 upon which the .drum I4 is mounted. This is a mere rudimentary description; it might be well to interrupt and state that the plate or the frame member l8 has a bore!!! in which are shown mounted a pair of antifriction bearings 20 and 2I and between the inner races of which there is a spacing plate22, The inner races of the bearings are shown mounted upon a framing member-23 which carries, by means of a pair of ballbeari-ngs 24 and 25, the tubular member 26 through which the member I to be coated, with the material Ii. passes, it having at its right hand end in Fig ure 2a plug 21 through which the material I0 passes.

' In'Figure 2 the sleeve 26 is. shown mounted in a sleeve 28 which is shown secured to the machine frame 200 and do not in the present show- ..ing rotate. 'The bearings'24 and 25 are separated on the sleeve 26..

Mounted on the outer members of the bearings 24 and 25 is the sleeve 23, which is driven by a. sprocket wheel'30 from some suitable train and which. sleeve has fast on to it a plate 3I which carries a mechanism for wrapping the tape I2 around the member I 0. The tape I2 is shown as being taken off that part of pad or reel which in the position of the parts shown in the drawings is the lower part, and passes over pulleys 32, '33 and 34, this pulley 34 being adjacent to but at an appreciable distance from. the pulley 35 which pulley 35 is mounted upon the second lever the first lever however being 45 and which levers are presently to be described, the tape then passes over a pulley 3E and in its passage from the pulley 35 to such pulley 36 it runs about parallel to partof the run from the pulley 34 to '35. From pulley 36 the tape passes of the material, to be wrapped upon the,

member III, requires that the bodyportion of pulley 32 be quite wide between its ends to permit of the necessary tape movement across it,

.' so also with several others of the pulleys as, for

instance, the pulley 34. The brake,'see Figure 3, comprises a torque --bandmember or belt 40 having located at .its places of applicationto the .drum M which is fast with the rotary member 18 some friction material 42.

The belt where it passesldoes not engage the pulley 43, and over. the drum 4I need not have the friction material applied to it. The

-torque band, after-it passes around the drum 4| is brought around a member 44 which, in the present instance, is in the form of a wheel fast on-the first lever '45.- The lever 45 is .mounted This lever barrel-is mounted 'on a ball bearing '49xset imthe plate 3I. The tension of the spring 41' is regulated by the nut 48 working on the end plunger rod. The direction of pressure is opposed to the drag of the material. Pivoted at 50 on lever 45 is the second lever 5| which carries the pulley 35 about which the material is wrapped.

While the first lever 45 is pressed by the stronger spring plunger 41, the second lever 5| is moved in the same direction as the lever 45 in the present illustration by means of the weaker coil springs 52 located in said lever 45.

By this arrangement a moderate change of "pullon' the material which is running over the roller 35 will move the lever 5I on its-pivot 53. A strong pull will completely press the portion 53 of this'lever against the end of the lever 45 andwill thus act on the lever 45 to compress the spring'41', which will release the action of the torque band 43.

Although the pulleys 32 to 31 would notappear'on the view of Figure 3, yet they havebeen shown in dotted lines for clearness'of illustration. The pulley '31, see Figure l, is mounted on a member 54 which is secured to the plate'3l by means of rivets 55,. theholes for such rivets are shown at '56 on'Figure 3.

The two ends of the band '40 pass around the member 44 and are united in the end of a screw 51 which has a nut 58 for its adjustment, it passing through a housing 59 which is a part of the lever 45.

It might be well at this point to describe the operation of the mechanism which is intended to wrap the band II onto the material 'II] which is passing out of the nozzle -21. The machine frame I00 remains stationary as do the parts 28, 26 and 21 so thatthe wire itself, or other head is rotated by means of a band which passes over the pulley whichin the present instance is shown as a two cog 0r sprocket wheel 30.

' It will be noted that owing. tothe manner-of winding up the material on the drum I4. that the pulleys 32, .33'and 34 will have to have considerable space between their heads whereas -as the material approaches its point ofiapplication,

the pulleys' 35 and36 more nearlyconform to the width of the material.

Sometimes it. is desirable tonapply a plurality of strips of material to the article being-wound, either the same material or different wrappings of different materials as the'case may require. In oneform'of'myinvention I have several such heads, three being .used in some of my machines. One form of the head is'illustrated in Figures 4 and 5. The brakemechanism is practically the same, but. some of the'details are. shown a little more clearly.

' The amount of material carried-by the drum is shown as greater in this illustration and it passes more directly to the point of .application #55, that is, it passes'from the drum at 6| over the pulley 62, passes over the pulley 'fi3ron-the second lever, then ,doubles back upon itself to a ipulleysi 64; then torithei point 'of application Hi0.

The'pads of material '61 revolve about article-60 being wrapped but do not rotate. I

The first lever in this instance is represented at I and being pivoted at IN. The second lever I02 is pivoted toit at I03. The spring which'is acted upon by the firstlever is represented at I04 and is carried by a housing I05 which is mounted by means of a roller bearing :26 and a ball bearing I01 in the frame member The springs between-the first lever I00 and the second lever I02 are shown at 65 engaging a face 66 of the second lever and rest in sockets in the first lever.

The spools, or pads, of which thepad 61 is representative, are rotated about their axes 14 which in turn ar caused to revolve about the member 15. They are carried by a. hub member I08 by arms I09which rotate on ball 'bearings II'0-I II on the stationary member 15. The torque band 16 is represented in Figure 5, passing over a pulley 58, this torque pulley 68 is shown mounted on antifriction bearings, in the present illustration, shown as roller bearings having rollers 69. The rollers run upona part 10 which has a reduced portion] I held in a bearing in the'plate 13 by means of a screw 12; an overturned portion 11 of the rotating member 13 houses this portion of the apparatus. Thetorque drum 19 which is connected with the spool upon which the'material 61 is wound engages the parts substantially as that described in the mechanism connected with Figure 3.

It may here be stated that the spool comprises a plate member 80 which has fast on it the torque drum 18. plate is fastened to an internal member 8| which has a plate 82 on the other side of the material 61 and. a hub member 83 resting upon the member 8|. There are a pair of ball bearings 84 within this hub member BI which run upon a member 85 which is held by means of a key to thershait member 14. The spool is adjustable in and out on the shaft 14 by means of a screw 86 which engages a nut 81 which seats against a ledge 88 in the bore 89.

soldered in place as seen at 90 so that the head9I and the flange 92 on the screw member 93 will cause this entire spool and its associated mechanism to be moved in either direction on the shaft 14. The heads 9I and 92 engage a flange 94 which is fast by means of screws 95 to the member 05. This flange also serves to hold the inner race of one of the ball bearings 94 in place, theother bearing engaging the hub member 96 of the wheel 13.

Reference will now be made to the chart which is illustrated on Figure 6 in which D represents the pad outside diameter in inches and d represents the eye diameter in inches so that if the eye diameter d is 6 inches and the outside diameter D is 18 inches the variation and running out from full diameter D to eye diameterd with the brake mechanism, which I have described, will increase about 14%.

On the chart is also represented a formula Preferably, the nut is D minus d V equals l00 plus 812 any single setting restricts tension variation on the strips or sheets during the entire running out .drum,

or paying out of the strip within the percentage above indicated.

Although some forms for carrying out my invention have been illustrated, yet it is to be understood that changes may be made within the scope of the claims without departing from the spirit of my invention.

The numeral 81.2 might be replaced by a constant C. The form as given above is less involved.

Having thus described my invention, I claim and desire to secure by Letters Patent the following:

1. In a device of the character specified, the combination with means for holding an advancing wire or cable, of a spool upon which is wound a strip or sheet of material it having its pay out revolvable about the wire or cable, and which strip, or sheet, is adapted to be paid out to the wire or cable upon which it is Wound, a brake drum connected to the spool and having an adjustable torque brake band upon it; and a compound fioat lever; any single adjustment restricting the tension variation on the strip from full to empty condition within the percentage of where D and d are the full and empty diameter of the roll or pad from which the sheet or strip is runoff.

2. The combination with means for holding material to be wound on a moving body,- of a brake drum, a brake band surrounding the drum, a first lever having means around which the brake band may be wound, a spring acting upon the first lever against the direction of pull of the material being wound, a second lever pivoted to said first lever, the second lever having means over which the material being wound passes, spring means lighter than that acting upon the first lever but acting in the same direction for permitting the movement of said second lever on said first lever, such material passing over a fixed pulley, over the pulley on the second lever to another fixed pulley on the machine, and then to the point of winding.

3. The combination with means for holding a pad of material to be wound upon a continuously fed body, of a drum on the pad for the application of a torque brake, a torque brake comprising a band passing around the said drum, means for tightening the torque band comprising a first lever having a member over which both sides of the brake band extend, a spring acting upon the first lever against the direction of pull of the material being wound, a second lever pivoted thereto, the second lever having spring means lighter than that acting upon the first lever but acting in the same direction, said second lever having a pulley over which the material passes in its passage from the pad, the material being wound passing over a fixed pulley, over the pulley on the second lever to another fixed pulley on the machine, and then to the point of winding.

4. The combination with means for rotatably supporting a pad of material to be wound ofi, a brake drum thereon concentric with its axis of rotation, a brake having a band passing over the a first lever pivoted to the supporting means and extending substantially radially thereof and having a wheel centered with its axis over which the brake band passes, means for applying spring pressure to said lever, means for adjusting the brake band, a second lever pivoted to the first lever, spring means acting upon. said second lever in the same directionas upon the first lever but weaker; thesecond lever .having a wheel over which the vmaterial: to be wound passes, a plurality of pulleys over which the material passes in going from the'pad, then over 'the pulley on the second lever,- another pulley located backwardly of the second lever pulley-and a pulley located .forwardly. thereof over which the material is fed to the point of .comprising a first lever pivoted substantially opposite the free wheel and having a wheel portion fastened to it concentric with its pivot over which the two joined together ends of the band pass, means acting on such joined ends for adjusting the tension of the band, the said first lever extending substantially radially from the axis of rotation, a strong spring acting on the said lever, a second lever pivoted to the first lever and also extending substantially radially, a weaker spring between the two levers and acting in the direction of said strong spring, said second lever having a pulley over which the material passes.

6. The combination with means for holding material to be wound, of a brake drum associated therewith a free wheel, of a torque brake comprising a band passing around the said free wheel and drum, means for tightening the band comprising a first lever pivoted substantially opposite the free wheel and having a wheel portion fastened to it concentric with its pivot over which the end of the band pass, means acting on such end for adjusting the tension of the band, the said first lever extending substantially radially from the axis of rotation, a strong spring acting therewith, of. atorquebrake comprising a band passing around the said .drum, means vfor tighten- .ing the. ,band comprising a pivoted first lever having. a wheel portionsfastened to it concentric with its pivotzover which the-end of the.band pass, means acting on such end for adjusting the tension of the. band, the said first lever. extending I substantially radiallyfrom the axis of rotation,

a strongspring acting onthe lever, a second lever pivoted to the first lever and also extending substantiallyradially, a weaker spring between the two levers ;-and. acting .in the direction of said 3 strong spring, .said second leverhaving a pulley over which the material passes.

' 8. The combination with means .forholding va pad of material tobewound upona continuouslyrfedubodmof a drum on the pad .for the application of a torque brake, a torque'brake. comprising a band-passing-around the said drum, 20-

means for tighteningithetorqueband comprising a first lever having a member over which both sides of; the brake :band extend, a spring acting wheel over which the material to be wound passes,

on the said first'lever, a second lever pivoted to v the first lever and also extending substantially radially, a weaker spring between. the two levers and acting in the direction of said strong spring, said second lever having a pulley over which the material passes.

'7. The combination with means for. holding material to be wound, of a brake drum associated upon. thelfirst leveragainst the'direction of pull of the :material being wound,- a .second lever pivotedthereto; said. second lever having a pulley .over which the material :passesin its passage from thepad, :spring means lighter than that acting upon the first leverbut acting tion.

9. The combination with-meansiorrotatably supporting a pad. of material tobe wound off, a brake drum thereon, concentric with its axis of rotation, abrake having a bandpassing over the drum.,. a. first:,lever .pivoted ,to, the supporting means and.g-extending, substantially radially in the. same direc- -thereon and having a spring acting-upon the first lever, means for. adjustingpthe brake band, a second leverpivoted .togthe-first lever, spring means acting. upon. saidsecond-lever in the same direction but. weaker, the second-lever having a a plurality of pulleysuover which, the material passes in going from the pad, then over the pulley on the second lever, another pulley located backwardlyof the. second. lever pulley and a pulley located forwardly... thereof: over which the material isf'ed-to the pointof winding.

:1 CHARLES F. VAN HOOK. 

